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Wan Q, Zhai S, Chen M, Xu M, Guo S. Δfur mutant as a potential live attenuated vaccine (LAV) candidate protects American eels (Anguilla rostrata) from Vibrio harveyi infection. Microb Pathog 2024; 189:106591. [PMID: 38401591 DOI: 10.1016/j.micpath.2024.106591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 02/18/2024] [Accepted: 02/18/2024] [Indexed: 02/26/2024]
Abstract
The eel farming industry is highly susceptible to Vibriosis. Although various types of vaccines against Vibriosis have been investigated, there is limited research on decreasing the virulence of Vibrions through gene knockout and utilizing it as live attenuated vaccines (LAV). In this study, we aim to develop a LAV candidate against Vibrio harveyi infection in American eels (Anguilla rostrata) using a ferric uptake regulator (fur) gene mutant strain of V. harveyi (Δfur mutant). After the eels were administrated with the Δfur mutant at the dose of 4 × 102 cfu/g body weight, the phagocytic activity of the leucocytes, plasma IgM antibody titers, activity of lysozyme and Superoxide Dismutase (SOD) enzyme, and gene expression levels of 18 immune related proteins were detected to evaluate the protection effect of the LAV. Preliminary findings suggest that the LAV achieved over 60% relative percent survival (RPS) after the American eels were challenged by a wild-type strain of V. harveyi infection on 28 and 42 days post the immunization (dpi). The protection was mainly attributed to increased plasma IgM antibody titers, higher levels of lysozyme, enhanced activity of SOD and some regulated genes encoded immune related proteins. Together, the Δfur mutant strain of V. harveyi, as a novel LAV vaccine, demonstrates promising protective effects against V. harveyi infection in American eels, thus presenting a potential candidate vaccine for fish farming.
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Affiliation(s)
- Qijuan Wan
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PR China, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China
| | - Shaowei Zhai
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PR China, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China
| | - Minxia Chen
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PR China, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China
| | - Ming Xu
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PR China, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China
| | - Songlin Guo
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PR China, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China.
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Wu M, Zhao J, Wu W, Hao C, Yang Y, Zhang J. miR-130b regulates B cell proliferation via CYLD-mediated NF-κB signaling. Exp Cell Res 2024; 434:113870. [PMID: 38049082 DOI: 10.1016/j.yexcr.2023.113870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/06/2023]
Abstract
Previous studies have revealed that B cell activation is regulated by various microRNAs(miRNAs). However, the role of microRNA-130b regulating B cell activation and apoptosis is still unclear. In the present study, we first found that the expression of miR-130b was the lowest in Pro/Pre-B cells and the highest in immature B cells. Besides, the expression of miR-130b decreased after activation in B cells. Through the immuno-phenotypic analysis of miR-130b transgenic and knockout mice, we found that miR-130b mainly promoted the proliferation of B cells and inhibited B cell apoptosis. Furthermore, we identified that Cyld, a tumor suppressor gene was the target gene of miR-130b in B cells. Besides, the Cyld-mediated NF-κB signaling was increased in miR-130b overexpressed B cells, which further explains the enhanced proliferation of B cells. In conclusion, we propose that miR-130b promotes B cell proliferation via Cyld-mediated NF-κB signaling, which provides a new theoretical basis for the molecular regulation of B cell activation.
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Affiliation(s)
- Mengyun Wu
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province 215000, China; MOE Key Laboratory of Geriatric Diseases and Immunology, Suzhou Medical College of Soochow University, Suzhou, Jiangsu Province 215000, China
| | - Jing Zhao
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province 215000, China; MOE Key Laboratory of Geriatric Diseases and Immunology, Suzhou Medical College of Soochow University, Suzhou, Jiangsu Province 215000, China
| | - Wenyan Wu
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province 215000, China; MOE Key Laboratory of Geriatric Diseases and Immunology, Suzhou Medical College of Soochow University, Suzhou, Jiangsu Province 215000, China
| | - Chuangli Hao
- Department of Respiratory Medicine, Children's Hospital of Soochow University, Suzhou, Jiangsu Province 215000, China.
| | - Yi Yang
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province 215000, China; MOE Key Laboratory of Geriatric Diseases and Immunology, Suzhou Medical College of Soochow University, Suzhou, Jiangsu Province 215000, China.
| | - Jinping Zhang
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province 215000, China; MOE Key Laboratory of Geriatric Diseases and Immunology, Suzhou Medical College of Soochow University, Suzhou, Jiangsu Province 215000, China.
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Xu M, Wang Y, Wan Q, Chen M, Guo S. RNA-seq analysis revealed the pathogenicity of Vibrio vulnificus to American eel (Anguilla rostrata) and the strategy of host anti-V. vulnificus infection. Microb Pathog 2024; 186:106498. [PMID: 38097116 DOI: 10.1016/j.micpath.2023.106498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/02/2023] [Accepted: 12/08/2023] [Indexed: 12/18/2023]
Abstract
Vibrio vulnificus is a commonly pathogenic bacterium in cultivated eels, but its pathogenicity to American eel (Anguilla rostrata) and the molecular mechanism of host anti-V. vulnificus infection remains uncertain. In this study, American eels were infected with different dose of V. vulnificus to determine the LD50. Then, bacterial load in the liver and kidney histopathology were assessed post the LD50 of V. vulnificus infection. Additionally, gene expressions of 18 immune related genes in the liver, spleen and kidney were detected. Furthermore, transcriptome sequencing and enrichment of differentially expressed genes (DEGs) were analyzed in the eel spleens between pre-infection (Con_0), post-36 h (Vv_36), and post-60 h (Vv_60) infection. The results showed that LD50 of V. vulnificus to American eels was determined to be 5.0 × 105 cfu/g body weight, and the bacterial load peaked at 24 and 12 h post the infection (hpi) in the kidney and liver, respectively. The histopathology was highlighted by necrotic hepatocytes and splenic cells, congestion blood vessels in liver and spleen, atrophied glomeruli and vacuolization of renal tubular epithelial cells. The results of RT-PCR revealed that 18 host immune-related genes showed significantly up or downregulated expression post-infection compare to that of pre-infection. Finally, results of the RNA-seq revealed 16 DEGs play essential role to the immunosuppression in American eels, and the protein-protein interactions shed light on the widespread upregulation GEGs related to metabolism and immune response maintained the host cell homeostasis post the V. vulnificus infection, shedding new light on our understanding of the V. vulnificus pathogenesis towards understudied American eel and the host anti-V. vulnificus infection strategies in gene transcript.
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Affiliation(s)
- Ming Xu
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PRC, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China
| | - Yue Wang
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PRC, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China
| | - Qijuan Wan
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PRC, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China
| | - Minxia Chen
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PRC, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China
| | - Songlin Guo
- Fisheries College of Jimei University/Engineering Research Center of the Modern Industry Technology for Eel. Ministry of Education of PRC, Xiamen, 361021, China; State Key Laboratory of Mariculture Breeding, Fisheries College of Jimei University, China.
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Liao L, Yao Z, Kong J, Zhang X, Li H, Chen W, Xie Q. Exploring the role of miRNAs in early chicken embryonic development and their significance. Poult Sci 2023; 102:103105. [PMID: 37852050 PMCID: PMC10587638 DOI: 10.1016/j.psj.2023.103105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 08/10/2023] [Accepted: 09/07/2023] [Indexed: 10/20/2023] Open
Abstract
In the early stages of embryonic development, a precise and strictly controlled hierarchy of gene expression is essential to ensure proper development of all cell types and organs. To better understand this gene control process, we constructed a small RNA library from 1- to 5-day-old chick embryos, and identified 2,459 miRNAs including 827 existing, 695 known, and 937 novel miRNAs with bioinformatic analysis. There was absolute high expression of a number of miRNAs in each stage, including gga-miR-363-3p (Em1d), gga-miR-26a-5p (Em2d and Em3d), gga-miR-10a-5p (Em4d), and gga-miR-199-5p (Em5d). We evaluated enriched miRNA profiles, identifying VEGF, Insulin, ErbB, MAPK, Hedgehog, TLR and Hippo signaling pathways as primary regulatory mechanisms enabling complex morphogenetic transformations within tight temporal constraints. Pathway analysis revealed miRNAs as pivotal nodes of interaction, coordinating cascades of gene expression critical for cell fate determination, proliferation, migration, and differentiation across germ layers and developing organ systems. Weighted Gene Co-Expression Network Analysis (WGCNA) generated hub miRNAs whose modular connections spanned regulatory networks, including: gga-miR-181a-3p (blue module), coordinating immunegenesis and myogenesis; gga-miR-126-3p (brown module), regulating vasculogenesis and angiogenesis; gga-miR-302c-5p (turquoise module), enabling pluripotency and self-renew; and gga-miR-429-3p (yellow module), modulating neurogenesis and osteogenesis. The findings of this study extend the knowledge of miRNA expression in early embryonic development of chickens, providing insights into the intricate gene control process that helps ensure proper development.
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Affiliation(s)
- Liqin Liao
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, China; Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangzhou 510642, Guangdong, China
| | - Ziqi Yao
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China
| | - Jie Kong
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, China
| | - Xinheng Zhang
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, China; Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangzhou 510642, Guangdong, China
| | - Hongxin Li
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China; Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangzhou 510642, Guangdong, China
| | - Weiguo Chen
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, China
| | - Qingmei Xie
- Heyuan Branch, Guangdong Provincial Laboratory of Lingnan Modern Agricultural Science and Technology, College of Animal Science, South China Agricultural University, Guangzhou 510642, China; Guangdong Provincial Key Lab of Agro Animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, China; South China Collaborative Innovation Center for Poultry Disease Control and Product Safety, Guangzhou 510642, China; Key Laboratory of Animal Health Aquaculture and Environmental Control, Guangzhou 510642, Guangdong, China.
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Wang Y, Zhai S, Wan Q, Xu M, Chen M, Guo S. Pathogenicity of Edwardsiella anguillarum to American eels (Anguilla rostrata) and RNA-seq analysis of host immune response to the E. anguillarum infection. FISH & SHELLFISH IMMUNOLOGY 2023; 141:109042. [PMID: 37657556 DOI: 10.1016/j.fsi.2023.109042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/23/2023] [Accepted: 08/26/2023] [Indexed: 09/03/2023]
Abstract
Edwardsiella anguillarum is a commonly pathogenic bacterium in cultivated eels, but its pathogenicity to American eel (Anguilla rostrata) and the molecular mechanism of host anti-E. anguillarum infection remains uncertain. In this study, LD50 of E. anguillarum to American eels was determined and bacterial load in the liver and kidney of eels was assessed post the LD50 of E. anguillarum infection. The results showed that LD50 of E. anguillarum to American eels was determined to be 2.5 × 105 cfu/g body weight, and the bacterial load peaked at 36 and 72 h post the infection (hpi) in the kidney and liver, respectively. Then, the histopathology was highlighted by congestion in splenic blood vessels, atrophied glomeruli, and necrotic hepatocytes, as well as ultrastructural pathology in the kidney were charactered by acute nephritis, showing necrosis of the renal tubular epithelial cells, glomerular capillaries dilate, mitochondria swelling and ribosomes separate from the endoplasmic reticulum. Furthermore, the results of qRT-PCR revealed that 12 host immune-related genes showed significantly up or downregulated post-infection compare to that of pre-infection. Finally, results of the RNA-seq revealed 6 hub DEGs play essential role to the anti-E. anguillarum infection in American eels. Pathogenicity of E. anguillarum to American eels and hub genes related host anti- E. anguillarum infection were firstly reported in this study, shedding new light on our understanding of the E. anguillarum pathogenesis and the host immune response to the E. anguillarum infection strategies in gene transcript.
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Affiliation(s)
- Yue Wang
- Fisheries College, Jimei University, China; Engineering Research Center of the Modern Industry Technology for Eel, Ministry of Education of PRC, Xiamen, 361021, China
| | - Shaowei Zhai
- Fisheries College, Jimei University, China; Engineering Research Center of the Modern Industry Technology for Eel, Ministry of Education of PRC, Xiamen, 361021, China
| | - Qijuan Wan
- Fisheries College, Jimei University, China
| | - Ming Xu
- Fisheries College, Jimei University, China
| | - Minxia Chen
- Fisheries College, Jimei University, China; Engineering Research Center of the Modern Industry Technology for Eel, Ministry of Education of PRC, Xiamen, 361021, China
| | - Songlin Guo
- Fisheries College, Jimei University, China; Engineering Research Center of the Modern Industry Technology for Eel, Ministry of Education of PRC, Xiamen, 361021, China.
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